<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{
    /**
     * Authenticates a user.
     * The example implementation makes sure if the username and password
     * are both 'demo'.
     * In practical applications, this should be changed to authenticate
     * against some persistent user identity storage (e.g. database).
     * @return boolean whether authentication succeeds.
     */
    public function authenticate()
    {
        $userDomain = new UserDomain();
        $user = $userDomain->login($this->username, $this->password);
        if (empty($user))
            $this->errorCode = self::ERROR_USERNAME_INVALID;
        else
            $this->errorCode = self::ERROR_NONE;
        return !$this->errorCode;
    }
}